Machine Learning Researcher – PhD Graduate (US)

Citadel Securities; Miami (FL); On-site; USD 235,000 - 300,000; Full time

Job summary

Citadel Securities is seeking extraordinary researchers to advance quantitative trading through machine learning and AI in a fast-paced environment. You will join teams in Miami or New York, applying statistics and ML to extract patterns from large datasets while building and testing models.

Candidates should hold a PhD in a quantitative field, demonstrate a strong ML research track record, and be proficient in Python and/or C++.

Qualifications

• PhD in a highly quantitative field (e.g., mathematics, statistics, physics, CS).
• Strong research track record in statistics, ML, or AI.
• Experience in a data-driven research environment with attention to detail.
• Hands-on programming in Python and/or C++.
• Excellent problem‑solving skills and clear communication of complex ideas.
• Ability to develop and apply algorithms to large datasets and error-checking tasks.

Responsibilities

• Apply statistics, ML, or AI to extract patterns from varied datasets.
• Implement high-quality production code for research models.
• Work with large, unstructured data sources and back-test models.
• Document research findings and share insights with the team.

Skills

Python

C++

Statistics

Machine Learning

Deep Learning

NLP

Data Analysis

Research

Communication

Education

PhD in quantitative field

Job description

At Citadel Securities, a leading global market maker, our team of quantitative researchers models the markets and brings trading strategies to life every day. Specifically, the goal of this team is to leverage and tailor the state‑of‑the‑art machine learning and AI algorithms to modernize the quantitative trading industry. We’re looking for extraordinary and highly motivated researchers who are excited about solving challenging problems and iterating in a fast‑paced environment.

Your Objectives

• Use statistics, machine learning or AI (e.g. deep learning, NLP) to extract patterns from various kinds of datasets through innovative and rigorous research
• Implement algorithms in high-quality code
• Work with large data sets, including unconventional and unstructured data sources
• Back‑test models and document research findings

Your Skills & Talents

• PhD degree in mathematics, statistics, physics, computer science, or another highly quantitative field
• Advanced training and strong research track record in statistics, machine learning, AI, or another highly quantitative field
• Prior experience working in a data‑driven research environment. Detail oriented and can deep dive into the data.
• Hands on programming experience in scripting (e.g. Python) and/or compiled languages (e.g. C++)
• A background demonstrating strong problem‑solving skills
• An ability to communicate advanced concepts in a concise and logical way
• Proficiency in creating and using algorithms to meticulously investigate and work through large data or error‑checking problems

Opportunities available in Miami and New York.

In accordance with applicable law, the base salary range for this role is $235,000 to $300,000.

In addition, the employee who fills this role will be eligible to participate in a discretionary incentive compensation program, as well as a wide array of benefit programs, such as medical and life insurance, retirement and tax‑free savings plans, and access to other healthcare programs.